Perhaps you should try some spelling variations:
thai cua » than cua, tai cuc, tri cua
va thanh » ban thanh, va tinh, le thanh
sach ky » sach y, sach ty, sach kem
cam tuc » cam xuc, cam tu, nam thuc
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
sac ky » cac ky, sai ky
va cam » va cham, va cac, va cao

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((sach ky) OR (sac ky)) nang ma hoi. hieu va cam tuc ((va thanh) or (gia thanh)) thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sach ky) OR (sac ky)) nang ma hoi. hieu va cam tuc ((va thanh) OR (gia thanh)) thai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((sach ky) OR (sac ky)) nang ma hoi. hieu va cam tuc ((va thanh) or (gia thanh)) thai cua tre".
• Adding a wildcard symbol may retrieve word variants: toc ((sach ky) OR (sac ky)) nang ma hoi. hieu va cam tuc ((va thanh) or (gia thanh)) thai cua tre*.